Ventilating-door for furnaces.



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UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

JOSEPH SIDAWAY, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-FOURTH TO EDWIN A. BATT, OF CLEVELAND, OHIO.

VE NTlLATlNG-D O OR FOR FURNACES.

SPEGIFIOATION forming part of Letters Patent N 0. 731,23 5, dated June 16, 1903.

Application filed November 1, 1902. Serial No.129,692. (No model.)

zen of the United States, residing at Oleve-' land, in the countyof Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Ventilating-Doors for Furnaces; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in' ventilating-doors for smoke-consuming furnaces; and the object of the invention is to provide a door which is adapted to be substi tuted for an ordinary closed furnace-door in furnaces which are already erected, as well as to provide an article of manufacture and sale which is generally adapted to furnace use whether the furnace be new or old, and the said door is constructed to be attached and operated substantially as herein shown and described, and particularly pointed out in the claims.

In theaccompanyingdrawings, Figure 1 is a front elevation of afurnace which is equipped with two of my improved doors. Fig. 2 is a cross-section of a part of the furnace-front and showing one of the doors in plan and partially open in full lines and in both open and closed position in dotted lines, as hereinafter more fully described. Fig. 3 is a vertical sectional elevation on line X X, Fig. 1; and Fig. 4 is an enlarged perspective View of one of the hinge connections for the door.

As thus shown and described, A represents what may be regarded as an ordinary furnace-front provided in this instance with two openings for doors and having my improved doors B set into said openings. Both of these doors are exactly alike in all particulars of construction and operation, and therefore a description of one serves the purpose for both.

In this construction Ihave planned to adapt this door as a substitute for doors as they are ordinarily found in furnaces of a common kind and which usually are closed doors in contradistinction to ventilating-doors. This door is also a distinctively ventilating-door adapted to be adjusted to provide such a volume of air to the furnace or fire as may be required to promote perfect combustion, to the end that the smoke may be consumed and corresponding economy in fuel may be realized. 'In a practical sense, therefore, this invention belongs to the class known as smokeconsumers or smoke-consu ming furnaces, and this is its ultimate object and efiect. To these several ends the furnace-front is provided with the usual door-supports or ears a, and the frame or yoke C, which carries the door,'has other ears or lugs c adjustably secured thereto and is connected with the ears or supports ct by means of hinge-links 2 and a link pin or rod 3, which passes down through ears 0 and the ends of links 2, while short locking-bolts 8 fasten links 2 rigidly to the ears or supports a. The object of this particular construction will be seen further along.

The door B is hinged at its upper and lower edges midway between its front and rear upon the extremities of yoke O by means of pivotpins or the like and upon which the door is adapted to swing around'from front to rear, if desirable, and has all the adaptation that a door of this kind can require to bring it to closing position into whatever new relationships it may be brought in different furnaces. The said door itself is provided with a central opening, into which is set abox b, which projects both within and without the door relatively, as seenin Fig. 3, and is open at both ends as well as being provided with a series of perforations 5 in its inner portion, through which air is admitted into the furnace under certain conditions. This box is provided with a set of sheaves or rollers 6 on each side in the same horizontal plane, and

The front plate d is liberally perforated for the admission of air, and the rear plate is adapted to be drawn close up to box b when ventilation through said box is not desired or may not be needed excepting as there may be a small supply of air flowing through perforations 5 in the side of the box and which is not out 01f by the plate d. By this construction I can set the said ventilating-plates at any needed position, according to the condition of the furnace at the time and as it may need more or less air to promote combustion. If a fresh supply of coal be added or there would otherwise be much smoke arising therefrom and unconsumed, I may open the ventilator to meet the needs of the furnace at that time, and, if necessary, in such way as to give it the maximum supply of air possible through said door. Such maximum supply would bring the several parts into relation, substantially as seen in Fig. 3, and if this be not sufficient and more air be needed I can swing the door into a partially-open position and relatively, as seen in full lines, Fig. 2. In this case there will be air admitted about the edge of the door as well as through it, and thus the fullest volume of air that may be needed can easily be secured.

The inner plate D serves as an air-distributer, because there is abundance of room about its edge for the air to enter the furnace through the door-opening, While at the same time the said plate receives the radiated heat from the furnace and more or less heats the incoming air, which is carried again at the deflector, and thus the parts of the door back of the plate d are in a large measure protected from the heat, while the said plate serves its other functions as well, and it it should burn out it can be easily replaced and is comparatively inexpensive:

these elements for the purpose of adapting my improved door to various and different conditions as they may be found on doors which have already been set for use. Sometimes the door-supports a are comparatively near the door-opening and in others they are farther away. Sometimes they are comparatively near each other and in other cases they are farther apart. For this first condition to adapt my improved door to practically any location on support a, whether near to or far from the door-opening, I employ the links 2, and when I have found the proper position from which the door can be swung open and shut without catching at any point I fasten the said links upon the supports a by the screws or bolts 8, employed for this purpose. These links must be made rigid with the supports a and practically serve as an extension of the supports, providing a new center of rotation for the door instead of the support a serving that purpose. Of course I could in like manner use supports a on new furnaces where no other door had been used before, or I could make the supports a of such construction as to stand out from the furnacefrouts sufficiently to pivot my door directly thereon and omit links 2. Then as a further modification and possibility of construction to get practically the same results as the links 2 provide I may build yoke Owith extensions 0, which have slotted and bolted connection with the body of the yoke, as shown at c in the several figures, and thus I may fix the links 2 in any given position and make the adaptation of the door to the opening, or I may do this by adjusting the extension 0' on the yoke or by both-ways. In some cases I may omit link 2 altogether and pivot the yoke directly upon the door-supports a and depend wholly upon extensions c to get working position for the door.

The ventilating-plates d and at being rigidly connected by the bars or rods 7, they travel back and forth together on their rollersupports and remain .in any adjusted position until they are changed by hand.

To further promote combustion, I provide a steam-supply pipe G, from which there are a series of jets 9, extending through the furnace-wall and adapted to discharge steam in to the furnace over the door.

What I claim is 1. In smoke-consuming furnaces, a venti lating-door and a yoke on which said door is pivotally supported, in combination with means to engage the same on the door-supports, said means comprisingears adj ustably fixed to said yoke, fixed pivot-supports on the door-front and links connecting said ears and pivot-supports, substantially as described.

2. In smoke-consuming furnaces, a ventilating-door and a yoke supporting the same, in combination with fixed door-supports on the furnace-front, and links connecting the said yoke with the said supports, whereby the door is adapted to furnaces in which the said supports are set at different distances from the door-opening in the furnace-fronflsubstantially as described.

3. In smoke consuming furnaces, a ventilating-door provided with awalled air-passage through the same and extending both within and without the door, and connected plates adapted to close either end of said passage and to control the flow of air through the same, substantially as described.

4. In smoke-consuming furnaces, a door provided with a walled air-passage through its center, in combination with a set of plates at the ends of said passage within and without the door, rollers in said passage and supports connecting the said plates and running on said rollers, substantially as described.

5. In furnaces, a doorand a yoke on which the door is pivoted to swing horizontally, and a walled passage through said door open at both ends, in combination with plates at'the front and rear of said passage and connections between said plates of greater length than said passage, whereby the flow of air through the passage can be controlled, substantially as described.

6. In furnaces, a door and a yoke on which ICC it has vertical pivots, and a box in said door Witness myhand to the foregoing specificaopen at both ends for the passage of air, in tion this 20th day of October, 1902.

combination with a deflecting-plate at the inner end of said box and a perforated venti- JOSEPH SIDAWAY' 5 lating-plate at the front thereof, and guide- Witnesses:

bars through said wall supporting said plates, R. B. MOSER,

substantially as described. A. N.'MOSER. 

